> For the complete documentation index, see [llms.txt](https://help.auxalia.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.auxalia.com/plant-tools/plantexpresstools/how-to-use/renumber/usage/use-cases-for-3d-objects.md).

# Use Cases for 3D objects

This chapter describes how the renumbering works in 3D\*\*.\*\*

We will use the following settings to renumber the ItemCode property accross all classes

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-e502e53892c1fb78f59e4b995cea2bd1e2a11a35%2FPET-Renumber-0032.png?alt=media)

Let's select the Piping Fittings in the order shown in the image.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-240045d14c0dfec9a4abe61ceedb49b9200eedc9%2FPET-Renumber-0030.png?alt=media)

When we select the last pipe we see, that the pipe has 7.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-8554d1c2a8472a45bc7450b4aa985c9c0c6b0102%2FPET-Renumber-0031.png?alt=media)

If you want to renumber the sub parts of a connector you use CTRL and select the part (e.g. Gasket, BoltSet).

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-98a73e56e89aa65368df47b0083d6e526869c356%2FPET-Renumber-0033.png?alt=media)

When we check the properties of a sub part we then see the filled ItemCode.

![](https://2994090777-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZH2AGHzvPfBW7YdaaGc0%2Fuploads%2Fgit-blob-d88419c0d2b26c37404aeb7db649fa0409e350ee%2FPET-Renumber-0034.png?alt=media)